atlas::LorentzVector Class Reference

#include <LorentzVector.hh>

Inheritance diagram for atlas::LorentzVector:

List of all members.

Public Member Functions
	LorentzVector ()
	LorentzVector (double p1, double p2, double p3, double p0)
	LorentzVector (const LorentzVector &p)
double	p () const
double	pt () const
double	mt () const
double	y () const
double	Et () const
double	et () const
double	e () const
double	eta () const
double	phi () const
void	add (LorentzVector v)
void	subtract (LorentzVector v)
bool	isEqual (LorentzVector v)
Public Attributes
double	px
double	py
double	pz
double	E

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Detailed Description

Definition at line 19 of file LorentzVector.hh.

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Constructor & Destructor Documentation

atlas::LorentzVector::LorentzVector

(

)

[inline]

Definition at line 25 of file LorentzVector.hh.

: px(0), py(0), pz(0), E(0) {}

atlas::LorentzVector::LorentzVector	(	double	p1,
		double	p2,
		double	p3,
		double	p0
	)		[inline]

Definition at line 26 of file LorentzVector.hh.

: px(p1), py(p2), pz(p3), E(p0) {}

atlas::LorentzVector::LorentzVector

(

const LorentzVector &

p

)

[inline]

Definition at line 27 of file LorentzVector.hh.

: px(p.px), py(p.py), pz(p.pz), E(p.E) {}

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Member Function Documentation

void atlas::LorentzVector::add

(

LorentzVector

v

)

[inline]

Definition at line 43 of file LorentzVector.hh.

References E, px, py, and pz.

Referenced by atlas::Jet::addConstituent(), atlas::Jet::addJet(), and atlas::Jet::Jet().

  {
    px += v.px;
    py += v.py;
    pz += v.pz;
    E  += v.E;
  }

double atlas::LorentzVector::e

(

)

const [inline]

Definition at line 34 of file LorentzVector.hh.

References E.

Referenced by atlas::JetSplitMergeTool::execute(), and atlas::JetSorter_E::operator()().

{return E;}

double atlas::LorentzVector::Et

(

)

const [inline]

Definition at line 32 of file LorentzVector.hh.

References E, p(), and pt().

Referenced by et().

{return E/p()*pt();}

double atlas::LorentzVector::et

(

)

const [inline]

Definition at line 33 of file LorentzVector.hh.

References Et().

Referenced by atlas::JetSorter_Et::operator()().

{return Et();}

double atlas::LorentzVector::eta

(

)

const [inline]

Definition at line 35 of file LorentzVector.hh.

References p(), and pz.

Referenced by atlas::JetDistances::deltaEta(), atlas::JetSorter_Eta::operator()(), and atlas::JetConeFinderTool::reconstruct().

{return 0.5*log((p() + pz)/(p() - pz));}

bool atlas::LorentzVector::isEqual

(

LorentzVector

v

)

[inline]

Definition at line 57 of file LorentzVector.hh.

References E, px, py, and pz.

  {
    return px == v.px && py == v.py && pz == v.pz && E == v.E;
  }

double atlas::LorentzVector::mt

(

)

const [inline]

Definition at line 30 of file LorentzVector.hh.

References E, and pz.

{return sqrt((E-pz)*(E+pz));}

double atlas::LorentzVector::p

(

)

const [inline]

Definition at line 28 of file LorentzVector.hh.

References px, py, and pz.

Referenced by Et(), and eta().

{return sqrt(px*px + py*py + pz*pz);}

double atlas::LorentzVector::phi

(

)

const [inline]

Definition at line 36 of file LorentzVector.hh.

References M_PI, px, and py.

Referenced by atlas::JetDistances::deltaPhi(), and atlas::JetConeFinderTool::reconstruct().

  {
    double r = atan2(py,px);
    if(r < 0)
      r += 2*M_PI;
    return r;
  }

double atlas::LorentzVector::pt

(

)

const [inline]

Definition at line 29 of file LorentzVector.hh.

References px, and py.

Referenced by Et(), and atlas::JetSorter_Pt::operator()().

{return sqrt(px*px + py*py);}

void atlas::LorentzVector::subtract

(

LorentzVector

v

)

[inline]

Definition at line 50 of file LorentzVector.hh.

References E, px, py, and pz.

Referenced by atlas::Jet::removeConstituent().

  {
    px -= v.px;
    py -= v.py;
    pz -= v.pz;
    E  -= v.E;
  }

double atlas::LorentzVector::y

(

)

const [inline]

Definition at line 31 of file LorentzVector.hh.

References E, and pz.

{return 0.5*log((E + pz)/(E - pz));}

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Member Data Documentation

double atlas::LorentzVector::E

Definition at line 23 of file LorentzVector.hh.

Referenced by add(), e(), Et(), isEqual(), mt(), subtract(), and y().

double atlas::LorentzVector::px

Definition at line 23 of file LorentzVector.hh.

Referenced by add(), isEqual(), p(), phi(), pt(), atlas::JetSplitMergeTool::split_merge(), and subtract().

double atlas::LorentzVector::py

Definition at line 23 of file LorentzVector.hh.

Referenced by add(), isEqual(), p(), phi(), pt(), atlas::JetSplitMergeTool::split_merge(), and subtract().

double atlas::LorentzVector::pz

Definition at line 23 of file LorentzVector.hh.

Referenced by add(), eta(), isEqual(), mt(), p(), subtract(), and y().

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The documentation for this class was generated from the following file:

• plugins/ATLASCone/LorentzVector.hh